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Harlan 1982 designed a 10-point
*sinc* interpolator as follows:

| |
(5) |

In the time-space domain this interpolation corresponds to multiplication by
a rounded rectangle function centered at *T*/2.
This operator almost avoids the wraparound effect.
Figure 4 shows the impulse response of
Harlan's 10-point interpolator. We can hardly find
any artifacts in this display.

Stanford Exploration Project

11/16/1997